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But it added that the levy had effectively created a "target" of just below the 5g threshold, and products had clustered below 5g as a result.

On Monday, the Treasury also confirmed proposals to reduce the maximum amount of sugar allowed in drinks before they become subject to the levy from 5g to 4g per 100ml.

In her photo, Rowling is notably posted up on a yacht or some beach resort, enjoying the spoils of her wealth and a strong 5G signal from her cellular provider.

It comes as Malaysian mobile data service company U Mobile said it will roll out the country's second 5G network by using infrastructure technology from China's Huawei and ZTE.

The potential danger posed by Chinese investment in UK infrastructure has been extensively debated in recent years - and a particular flashpoint was the involvement of the Shenzhen-based Chinese technology company Huawei in building the UK's 5G communications infrastructure.